Zobrazeno 1 - 10
of 22
pro vyhledávání: '"Urmas Haud"'
Context. There are significant amounts of H2 in the Milky Way. Due to its symmetry H2 does not radiate at radio frequencies. CO is thought to be a tracer for H2, however CO is formed at significantly higher opacities than H2. Thus, toward high Galact
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::25000be5e77061eaea8fc82c65aede72
http://arxiv.org/abs/2004.14630
http://arxiv.org/abs/2004.14630
Publikováno v:
Astronomy & Astrophysics. 654:A91
Context. H I filaments are closely related to dusty magnetized structures that are observable in the far infrared (FIR). Recently it was proposed that the coherence of oriented H I structures in velocity traces the line of sight magnetic field tangli
Dust polarization modeling at large-scale over the Northern Galactic cap using EBHIS and Planck data
Autor:
Urmas Haud, Peter M. W. Kalberla, Tuhin Ghosh, Debabrata Adak, Tarun Souradeep, François Boulanger, Peter G. Martin, Andrea Bracco
Publikováno v:
Astron.Astrophys.
Astron.Astrophys., 2020, 640, pp.A100. ⟨10.1051/0004-6361/201936124⟩
Astron.Astrophys., 2020, 640, pp.A100. ⟨10.1051/0004-6361/201936124⟩
The primary source of systematic uncertainty in the quest for the B-mode polarization of the Cosmic Microwave Background (CMB) introduced by primordial gravitational waves is polarized thermal emission from Galactic dust. Therefore, accurate characte
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cbba5a4e74b6bf164cf155560d47084f
https://hal.archives-ouvertes.fr/hal-02291537
https://hal.archives-ouvertes.fr/hal-02291537
Autor:
J. Aumont, Olivier Doré, Tuhin Ghosh, Andrea Bracco, Paolo Serra, Francois Boulanger, Peter G. Martin, James J. Bock, Peter M. W. Kalberla, Urmas Haud, Flavien Vansyngel
Publikováno v:
Astron.Astrophys.
Astron.Astrophys., 2017, 601, pp.A71. ⟨10.1051/0004-6361/201629829⟩
Astron.Astrophys., 2017, 601, pp.A71. 〈10.1051/0004-6361/201629829〉
Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, EDP Sciences, 2017, 601, pp.A71. ⟨10.1051/0004-6361/201629829⟩
Astronomy and Astrophysics-A&A, 2017, 601, pp.A71. ⟨10.1051/0004-6361/201629829⟩
Astron.Astrophys., 2017, 601, pp.A71. ⟨10.1051/0004-6361/201629829⟩
Astron.Astrophys., 2017, 601, pp.A71. 〈10.1051/0004-6361/201629829〉
Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, EDP Sciences, 2017, 601, pp.A71. ⟨10.1051/0004-6361/201629829⟩
Astronomy and Astrophysics-A&A, 2017, 601, pp.A71. ⟨10.1051/0004-6361/201629829⟩
The Planck survey has quantified polarized Galactic foregrounds and established that they are a main limiting factor in the quest for the cosmic microwave background (CMB) B-mode signal induced by primordial gravitational waves during cosmic inflatio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9a259c7196a4a0163d3486adb5e9e737
http://arxiv.org/abs/1611.02418
http://arxiv.org/abs/1611.02418
Autor:
Urmas Haud, P. M. W. Kalberla
Publikováno v:
Astronomy & Astrophysics. 619:A58
Context. A large fraction of the interstellar medium can be characterized as a multiphase medium. The neutral hydrogen gas is bistable with a cold and warm neutral medium (CNM and WNM respectively) but there is evidence for an additional phase at int
Publikováno v:
Astronomy & Astrophysics. 469:511-527
Context. Gas within a galaxy is forced to establish pressure balance against gravitational forces. The shape of an unperturbed gaseous disk can be used to constrain dark matter models. Aims. We derive the 3-D HI volume density distribution for the Mi
Autor:
P. M. W. Kalberla, Urmas Haud
Publikováno v:
Astronomy & Astrophysics. 466:555-564
Aims. We investigate the properties of the 21-cm radio-lines of galactic neutral hydrogen by decomposing, the profiles of "The Leiden/Argentine/Bonn (LAB) Survey of Galactic H I" into Gaussian components. The width distribution of the obtained compon
Autor:
Urmas Haud, Peter M. W. Kalberla
Publikováno v:
Astronomy & Astrophysics. 455:481-498
We study the properties of all major HVC complexes from a sample compiled 1991 by Wakker & van Woerden (WvW). We use the Leiden/Argentine/Bonn all sky 21-cm line survey and decompose the profiles into Gaussian components. We find a well defined multi
Publikováno v:
Astronomy & Astrophysics. 607:A15
LOFAR detected toward 3C 196 linear polarization structures which were found subsequently to be closely correlated with cold filamentary HI structures. The derived direction-dependent HI power spectra revealed marked anisotropies for narrow ranges in
The question, whether the stellar populations in the Milky Way take part in flaring of the scale heights as observed for the HI gas is a matter of debate. Standard mass models for the Milky Way assume a constant scale height for each of the different
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::abed89b2024eb2834012a5dad4de5e58
http://arxiv.org/abs/1408.5334
http://arxiv.org/abs/1408.5334